“Barrel race” means a horse race around a course with three barrels placed in a triangular pattern which may conform to the requirements of the Women’s Professional Rodeo Association. Two barrel racecourses may be run simultaneously in the form of a heat.
Source:
Section 19403.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC§ionNum=19403.5..